Boring-machine.



'PATENTED OCT. 29, 1907.

B.`G. MUELLBR.

BURING MACHINE.

APPLICATION FILED MAY 14.1906.

VV iTNESSES W C f @A UNITED STATES PATENT OFFICE.

EDWARD G. MUELLER, OF TOLEDO, OIl'IO7 ASSIGNOR TO THE TOLEDO BUSI'IING COMPANY, OF TOLEDO, OHIO, A CORPORATION OF OIIIO.

BORING-MACHINE No. 869,504. l'

Specification of Letters Patent.

Patented Oct. 29, 1907.

Application filed May 14, 1906. Serial No. 316.665.

To all whom it may concern:

Be it known that I, EDWARD C. MUELLER, a citizen ot the United States, residing at Toledo, in the county of Lucas and State ot Ohio, have invented certain new and useful Improvements in Boring-Machines; and I do declare the iollowing to be a lull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and lignres ol reference marked thereon, which form a part ol this specilieation.

` In the use of certain bung-hole bushings it is necessary to bore, in addition to the bunghole, two small Supplemental holes which iorm recesses in the margin l5 of the bung-hole. The purpose ot' these supplemental holes or recesses is to permit the passage oi the [lange of one ol the members of the bushing when it is introduced through the bung-hole into the barrel preparatory to its engagement with the other or outer member O the bushing. In boring these three holes it has been found ditlieult to establish their relative positions so exactly that the flange ot' the lnishing-meml)er will always coincide with thc opening and pass through the stave without obstruction.

My invention relates to and its object is to provide a machine which shall overcome the dilliculties here indicated, and, more particularly, to provide a boring machine which shall bore the three holes at one operation and always in exactly the proper relation to each other.

I attain these objects by means ol' the devices and arrangement oi' yparts herein-alter described and shown, and illustrated in the accompanying drawingsv` in which- Figure l. is a vertical central sectional elevation ol my device; Fig. 2, a top-plan view ol' the same, and Fig. li, a top-plan view ot a .fragment oi' a barrel-stave showing the 'form of aperture produced by my machine.

Like numerals ot' reference indicate like parts through- 40 out the drawings.

In the drawings, l is a sli-ait tapped and threaded axially at its bottom i'or the reception of the threaded end 2 of the shank 3 oi the anger el, which anger is oi' proper dimensions to bore the required bung-hole.

The top of the shaft l is tapped and threaded axially to receive the threaded end 5 ol' a short reduced shalt or stud 6, the upper end ot' which is designed lor engagement with the bit-sto ck or other suitable means ior rotating the shaft. The bottom ol' shal't l has an enlarged portion l, of the diameter oi' the auger I. The shaft l at top is somewhat reduced in diameter, thus orming a shoulder 7 upon which rests a ring S, the shaft and the shoulder forming a bearing upon which the ring may be rotated. Through the ring 8, vertically, are two holes for the reception of the shanks 9 of small angers or bitsl. At the top of each shank 9 is secured a pinion Il engaged by the teeth of an internal gear wheel l2 rigidly secured to the shait 6. Secured to the ring 8 is a handle 13 which projects horizontally and radially as shown in Fig. 2A

The operation oi my device is as lollows. The shalt (i being connected with a suitable driving-mechanism, the point ol the auger=l is placed at the desired center and upon being given motion bores a circular hole through the stave. The instrument is supported in upright position and pressed downwardly by the handle 13 which also holds the ring S against rotation. As the auger i emerges .from the inner side oi the stave, the lower enlarged end l l ol' the shaft l passes into and ex actly lits the hole and furnishes a guide for the approaching points ol the bits l0. These bits are so located as to bore two holes which intersect the margin ol the principal hole, forming recesses therein as illustrated in Fig. ii. It will be seen that the ring S being held stationary and the pinions ll being engaged with the rotating internally toothed gear l2, the bits are given rapid axial motion and the two supi'ileniental holes are quickly bored in exactly the proper positions.

Having described my invention, what .I claim and desire to secure by Letters Patent is,-

l. ln n dcviceot the described character, an auger. n pair ol' angers of smaller diameter arranged in such relation lo the larger anger that their bores shall intersect the bore ol` the larger auger. a guide upon the shal't of the larger anger adapted to lit the bore o1' sncb auger and ex lending forward ol' the ends ol' thc smaller angers. and gears intermediate of the larger and the smaller angers.

2. ln n device ol thc described character. an auger. n pair ot' angers of smaller diameter arranged on either side ol' lhe larger auger, a c \'lil1drical guide upon the shai'l of the larger auger adapted to lit the bore ol' such anger and extending forward of the ends of the smaller angers. and gears intermediate the larger nugcr and the smaller angers.

2'. A boring` device comprising n main anger, an auger of smaller diameter disposed at the side ot' and in the rear of the main auger adapted lo notch the edge ol' the bore ot the main anger. and a guide disposed between the two angers arranged to enter the bore ot' the main auger and guide the smaller anger in its actionA -l, boring device having.,` a plurality ol' angers, comprising a shai'l t'or the central auger provided with an enlargement adapted to fit the bere of said auger, and auxiliary angers arranged at; the side of the central anger. the ends thereof being behind said enlargement, whereby they will be guided thereby. y

In testimony whereof l allix my signature in presence ot two witnesses.

EDWARD C. MUELLER.

\\'il.ne.sses 1 (lriar'rox' Munenr, Aim Law. 

